Comparison of Wavefront Guided LASIK Visual Outcomes between Two Different Aberrometers | ASCRS
Presentation
Comparison of Wavefront Guided LASIK Visual Outcomes between Two Different Aberrometers
May 2020
Meeting: 2020 Virtual Annual Meeting
Session: SPS-115 Refractive Procedure Comparisons: PRK, LASIK
Authors: Blake K. Williamson, MD, Lauren Lim MD, Margaret Hubbell PhD, MD
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Purpose
To evaluate the visual outcomes after laser-assisted in situ keratomileusis (LASIK) surgery for the correction of myopia or myopic astigmatism using 2 different wavefront aberrometers: WaveScan (Abbott Medical Optics, Inc, Santa Ana, CA) versus iDesign (Johnson & Johnson Vision Care Inc, Jacksonville, FL).

Methods
This retrospective study analyzed 200 eyes from 100 patients who underwent wavefront-guided LASIK performed by 2 different surgeons for myopia and myopic astigmatism using the VisX S41R excimer laser. Wavefront data was derived from WaveScan (102 eyes) or iDesign (98 eyes), a new generation Hartman-Shack aberrometer. Charts were analyzed for pre-operative uncorrected distance visual acuity (UDVA) and refractive error (as determined by WaveScan or iDesign aberrometers), and UDVA on post-op day 1, post-op week 1, post-op week 2, post-op months 1, 2, 3, 4, 5, 6 and 12 if available. Visual acuities were converted and reported into logMAR format for statistical analysis.

Results
Preoperative spherical equivalents differed significantly between the WaveScan (-1.83 ± 0.04 D) and iDesign (-3.29 ± 0.16 D) groups with more myopic patients treated by iDesign. Similarly, preoperative UDVA differed significantly between groups with Wavescan -0.01±0.01 and iDesign -0.07±0.01 (logMAR). Final postoperative UDVA differed significantly with iDesign averaging -0.07± 0.01 and WaveScan -0.01 ± 0.01. A monocular UDVA of 20/10, 20/15, 20/20 and 20/25 was achieved in 5%, 30%, 85% and 97% of Wavescan-treated eyes respectively and achieved in 11%, 57%, 89% and 99% in iDesign-treated eyes respectively. All data reported as average ± standard error. All p-values mentioned above are <0.01.

Conclusion
Despite higher preoperative myopia in the iDesign group, more patients in the iDesign group achieved superior final UDVA than the WaveScan group. More than half of iDesign patients achieved 20/15 vision or better versus less than a third of WaveScan patients. Although “20/happy” was the previous goal, “Better than Perfect Vision” can be achieved.
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This presentation is from the session "SPS-115 Refractive Procedure Comparisons: PRK, LASIK" from the 2020 ASCRS Virtual Annual Meeting held on May 16-17, 2020.

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